test_neighbours.py has been modified in order to respect the flake8 style.

theano/sandbox/cuda/tests/test_neighbours.py

 # Skip test if cuda_ndarray is not available.
 from __future__ import absolute_import, print_function, division
 from nose.plugins.skip import SkipTest
-
+import unittest
+import theano.tensor.nnet.tests.test_neighbours
+from theano.sandbox.cuda.neighbours import GpuImages2Neibs
 import theano.sandbox.cuda as cuda_ndarray
-if cuda_ndarray.cuda_available == False:
+if cuda_ndarray.cuda_available is False:
     raise SkipTest('Optional package cuda disabled')
 
-import theano.tensor.nnet.tests.test_neighbours
-from theano.sandbox.cuda.neighbours import GpuImages2Neibs
 
 if theano.config.mode == 'FAST_COMPILE':
     mode_with_gpu = theano.compile.mode.get_mode('FAST_RUN').including('gpu')